Answers to Chapter 20 Supplemental Problems

For Physics 30:

Chapter 20 Supplemental Problems

1. F/4
2. 4F
3. 1.0 x 10^-5 N
4. 8.0 x 10^-5 N
5. 6.25 x 10^18 electrons
6. +9.0 x 10^3 N
7. -1.1 x 10^2 N, the force is attractive
8. +44 N away
9. -9.2 x 10^-16 N
10. +2.5 N
11. 2.0 x 10^-10 C
12. -9.7 x 10^-6 C
13. 7.4 N to the left
14. 6.7 N at 7.2 degrees to the left of vertical

Come and see me tomorrow at noon if you're having any difficulties.